Koravisd Nathalang.. Factors important for somatic embryo induction and proliferation from young leaf explant of the biggest Gigantic teak. (). King Mongkut's University of Technology North Bangkok. Central Library. : , 2555.
Factors important for somatic embryo induction and proliferation from young leaf explant of the biggest Gigantic teak
Abstract:
Giant teak (Tectona grandis L.f. var. Sak Tong) inGiant Teak Forest Reserve, Nam Pad district, Uttaraditprovince, Thailand, is the biggest teak in the world.Its longevity is over 1,500 years and is now beingdeteriorated. To conserve all of its beneficialcharacteristics, plant tissue culture technology,especially somatic embryogenesis, provides anopportunity for rapid conservation and reforestation.Giant teak callus was extracted from youngleaf and cultured on half-strength MS basal mediumsupplemented with NAA and BAP in differentconcentrations. It was found that the induction mediumand optimum condition for somatic embryo inductionwere half-strength MS basal medium containing1 mg/l NAA and 1 mg/l BAP under 1,500 lux of Gro-luxfluorescence at 16 hour duration at 30 degree celsius and 8hours at 25 degree celsius of light and dark periods, respectively.This condition gave the highest growth index of embryogenic callus. After those embryogenic calliwere transferred into liquid medium under optimumcondition, globular and heart-shape embryo clearlyproliferated on the surface of embryogenic clumps.Moreover, these structures were also found suspendingin the liquid medium. The maturation medium andphysical conditions for further development of thesesomatic embryos are under investigation.